Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Components of Deferred Profit

The components of deferred profit are as follows:

	September 30,
	2017		2016
	(dollars in thousands)
Deferred revenue	$	6,822	$	7,029
Deferred costs	2,741		2,320
Deferred profit	$	4,081	$	4,709

Schedule of Product Warranty Liability

	Years Ended September 30,
	2017			2016
	(dollars in thousands)
Beginning balance	$	795		$	793
Additions for warranties issued during the period	1,723			1,074
Reductions in the liability for payments made under the warranty	(414		)	(832		)
Changes related to pre-existing warranties	(872		)	(250		)
Currency translation adjustment	22			10
Ending balance	$	1,254		$	795

Research and Development Expense

	Years Ended September 30,
	2017			2016			2015
	(dollars in thousands)
Research, development and engineering	$	7,001		$	9,535		$	13,214
Grants earned	(629		)	(1,531		)	(6,296		)
Net research, development and engineering	$	6,372		$	8,004		$	6,918